c# - Apply style on Content Control in a Word Document using OpenXML -

i'm trying generate word documents using openxml sdk , word document generator. need apply custom style on contentcontrols (repeating section).

for recursive placeholders, use

foreach (var item in list) {     var datacontext = new openxmlelementdatacontext()     {         element = openxmlelementdatacontext.element,         datacontext = item.value     };     var clonedelement = cloneelementandsetcontentinplaceholders(datacontext);     setcontentofcontentcontrol(clonedelement, item.value); } openxmlelementdatacontext.element.remove(); 

i need apply style on element. how can ?

i try see generated code "open xml sdk 2.5 productivity tool microsoft office" inspire me:

var moduledatacontext = new openxmlelementdatacontext() {     element = openxmlelementdatacontext.element,     datacontext = module.valeur }; var moduleclonedelement = cloneelementandsetcontentinplaceholders(moduledatacontext);  var sdtproperties1 = new sdtproperties(); var styleid1 = new styleid() { val = "formationtitre2" };  paragraphmarkrunproperties paragraphmarkrunproperties1 = new paragraphmarkrunproperties(); runfonts runfonts1 = new runfonts() { complexscripttheme = themefontvalues.minorhighansi };  paragraphmarkrunproperties1.append(runfonts1);  sdtproperties1.append(styleid1); sdtproperties1.append(paragraphmarkrunproperties1);  run run1 = new run() { rsidrunproperties = "00c463e5" };  runproperties runproperties1 = new runproperties(); runfonts runfonts2 = new runfonts() { complexscripttheme = themefontvalues.minorhighansi };  runproperties1.append(runfonts2);  run1.append(runproperties1);  moduleclonedelement.append(sdtproperties1); moduleclonedelement.append(run1); 

when open generated document, have error :

we're sorry. can't open "...docx" because found problem contents.

i validate document , can see 15 errors:

full size

i've found solution. search first paragraph , apply custom style on it.

// clone element var clonedelement = cloneelementandsetcontentinplaceholders(datacontext);  // search first created paragraph on clonedelement paragraph p = clonedelement.descendants<paragraph>().firstordefault(); if (p != null)     p.prependchild<paragraphproperties>(new paragraphproperties()); // paragraph properties paragraphproperties ppr = p.elements<paragraphproperties>().first(); // apply style ppr.paragraphstyleid = new paragraphstyleid { val = "formationtitre2" }; // set content of content control setcontentofcontentcontrol(clonedelement, item.value);